Machine for removing surplus powder from surfaces



APPLICATION FILED IUNE I`2. |919.

Patented Feb. 211, 1920.

4 SHEETS-SHEET l.

me/m0@ Km M. S. ROSENFELD. MACHINE Foa REMovlNG SURPLUS POWDER FROM suRFAcEs.

Y APPLICATION FILED JUNE l2, |919.

Patented Feb. 24, 1920.

4 SHEETS-SHEET 2.

M. S. ROSENFELD. MACHINE FOR REMOVING SURPLUS POWDER FROM SURFACES.

APPLICATION FLLED )UNE l2, |919.

Patented Feb. 24, 1920.

4 SHEETS-SHEET 3 M. S. HOSENFELD. MACHINE FOR REMOVING SURPLUS POWDER FROM SURFACES. APPLICATION FILED 1uNE12. 1919.

JUTED STATES PATENT FFICE;

MAURICE S. ROSENFELD,OF NEARK, NEW JERSEY, ASSIG-NOR TO DECALMO MACHINE COIMPANY, INC., A COBPORA'IIN OF DELA'WARE.

MACHINE FOR REMG''ING SUR-ELUS PVIBER FROM SURFACES.

Application filed .Tune 12, 1919.

To all whom it may concern.'

Be it known that lviAURron S. RosenrnLD, a citizen of the United States, residing in Newark, in the county of Essex, in

the State of New Jersey, have invented certain new and useful Improvements in Machines for Removing Surplus Powder from Surfaces, of which the following is a specification. l

The present invention relates to a ma.- chine for removingV surplus powder' from surfaces, and more particularly the invention relates to a machine for removing surplus bronze powder from waxed surfaces, such as the waxed paper upon which decalcoma-nias or transfer pictures are printed.

Decalcomanias or transfer pictures Vare commonly printed upon waxed paper, the wax serving to hold the decalcomania temporarily upon the paper. The decalcomania or transfer picture is usually composed of several ingredients in superposed layers one of whichV is coloring'matter constituting the body portion of the decalcomania. This coloring matter is often applied in a. powdered form, such as bronze or gold dust and the like. Hereinafter, for thesakc of convenience of description, the coloring matter will be referred to as bronze dust, although the invention is not to be considered as liniited to the removal of such powder or dust from waxed surfaces. Inasmuch as the bronze is applied to the transfer paper ina powdered state, it is Considered expedient not to print or impress it upon the` paper in the form of .a design, but to dust it on the paper loosely where it is caught and held by the tacky surface of a design previously printed upon the paper. Such is the nature of the wax with which the paper is coated, and such is the nature of the bronze powder itself, that some of the bronze powder adheres or clings to the waxed surface of the paper. The bronze powder does not, of course, adhere firmly to the waxed surface cf the paper, but its adherence is such that unless the proper methods of removing it,

are employed the powder is struck into the fwaxed surface more deeply, so that when heat and pressure are applied to the back of the paper in transferring the decalcomania to the textile goods it is intended to mark, the melted wax will. release the bronze powder embedded in it and the pres- ;Speceation of Letters Patent.

Patented Feb. 24, 1920.

Serial No. 303,585.

sure will cause this powder to be transferred to the textile goods with the result that the decalcomania will be surrounded by surplus powder. This surplus powder surrounding the decalcomania or transfer picture 0n the textile goods injures the appearance of the latter and therefore renders them less salable.

The object of the present invention is to produce a machine for removing from the waxed paper upon which the decalcomanias or transfer pictures are printed, the surplus bronze powder adhering to it, so that when the decalcomania or transfer picture is transferred to the textile goods by the application of heat and pressure the decalcomania will be printed upon the goods in sharply defined outlines unsurrounded by surplus powder. It has been found experimentally that if it is attempted to remove the surplus bronze powder from the waxed surface of the transfer paper by rubbing a cloth or other article over the paper, whether the cloth or other remover is coated with a sticky substance or not, much of the bronze powder is not removed from the paper but is driven into thewax and is not released therefrom until the wax is melted during the transfer operation. It has, likewise, been found that if the powder remover, which is conveniently of some yielding material, such as a composition of gelatine and molasses, coated with a sticky substance such as gum arabic, is impressed upon the transfer paper, then lifted therefrom without rubbing, and this process is repeated as many times as there are layers of surplus powder upon the transfer paper, all surplus powder upon the paper is eectually removed. This process of impressing the powder remover upon the transfer paper and lifting it therefrom without a rubbing movement upon the paper can be performed manually or mechanically. Inasmuch as the decalcomanias or transfer pictures are usually printed or impressed upon a roll or tape of paper., it is necessary to feed the transfer paper or tape in timed relation with the movements of the powder remover so that there will be no rubbing movement between the two. Although the powder remover may be made in various forms, it is most conveniently, for mechanical purposes, made in the form of a roll, which is constantly driven or rotated. The feed of the transfer tape to and past the powder removing roll, therefore, will be equal to the peripheral travel of the roll. As the tape moves past the roll, a fresh portion of the periphery of the roll will constantly engage with a fresh portion of the surface of the transfer tape. A machine for removing surplus powder' from surfaces embodying the foregoing and other features of the invention which will be pointed out hereinafter are embodied in the machine illustrated in the accompanying drawings, described in the following specification and particularly pointed out in the appended claims.

inthe accompanyingdrawings illustrating the preferred form of theinvention, Figure 1 is a front elevation of the machine for removing surplus powder from surfaces, the lower part of the machine being broken away. Fig. 2 is a rear elevation of the parts 4shown in Fig. 1. Fig. 3 is a section on an enlarged scale taken through Fig. 1. Fig. ,4 is a diagrammatic view of the powder removing rolls with the pressure rolls in inoperative position. Fig. 5 is a sectional elevation on an enlarged scale of a part of the' clutch of the take-up mechanism.Y And Fig. 6 is a section taken along the line 6 6 of Fig. 5.

The illustrated machine for removingl surplus powder from surfaces comprises a series of powder removing rolls 10, 11, 12 and 13 Vmounted on pins 15 journaled in the frame 16 risingfrom the table 17 forming the base of the machine. The construction of the mounting of the rolls as shown in Fig. 3 is such that the rolls may be readily and conveniently slipped off1 their bearing pins 'by removing the thumb pieces 18. The construction and mode of operation of this manner lof mounting the rolls is wellkncwn and readily understood without further detailed explanation. The pin or shaft 15 of each roll is provided with a bevel gear 20, which meshes with a corresponding bevel gear 21 fixed on a shaft 22 extending longitudinally (Fig. 2) ofthe frame 16 and journaled in the brackets 23. On the shaft 22 is mounted a gear 24 which meshes with and is driven by a pinion 25 fixed on the upper end of a vertically arranged shaft 26 journaied ina bracket 27 secured to the frame 16. On the lower end of the shaft 26 is mounted a bevel gear 31 which meshes is provided, j ournaled in the bracket 30. The hand-wheel 36 operates a two-part clutch 37, the parts of the clutch being normally separated by a spring 39.

The transfer tape 40, upon which the decalcomanias or ytransfer pictures are printed, is fed past the powder removingrolls and in contact therewith from a supply reel 41 to a take-up reel 42. The reel 41 is mounted on a pin 43 journaled in the outer ends of bracket arms 44 secured to the table 17, and the reel 42 is mounted on a pin or shaft 45 ournaled in the outer ends of the bracket arms 46 fixed to the. table 17. The transfer tape'is pressed against the powder removing rolls by a series of pressure rolls 48, 49,

Y50, 51 vand 52, which are mounted in the free ends of'arms 53 pivoted 'on pins 54 xed in the frame 16. The pressure rolls are each provided with a flange, as shown in Fig. 3, so as to guide the transfer tape in its passage by the powder removingrolls. As the transfer tape passes to the pressure rolls from the supply reel 41, it passes around a series of tension rolls 55, the upper one 56 of which is caused to exert a tension upon the transfer tape equal to the tension of a regulated spring 57.

The'transfer tape is fed through themachine by the take-up reel 42, the shaft 45 of which is provided with a gear 59 which is driven by the gear 60 mounted on a shaft 67 journaled yin lugs 68 projecting laterally from one of the bracket arms 46. The shaft 67 is connected with the shaft 69 Vby a universal joint, and the shaft 69 is connected with the driven part of a clutch by a second universal joint. The driven part 70 Vof the clutch is loosely mounted on one end of a shaft 71` journaled inV the'upper end of a bracket 72 risin'nv from the topof the table 17. The shaft 71 is provided with a gear 73 which meshes with and is driven bythe gear 31. The driving part 75 of the clutch is provided with a friction face 76 which is pressed against the face of the driven part 70 by a spring 77 surrounding thehub ofthe driving part 75. The tension of the spring 77 is regulated by a hand-nut 78. It is thus seen that when the machine is in operation and the powder removing relis are rotating, the take-up reel 42 will be driven to feed the transfer tape past the powder removing rolls. n

In order to prevent the increasing size of the rollof transfer tapeon the take-up reel from causing' the transfer ta e to be fed throughthe machine with increasing speed, the machine isprovided with a feed controlling mechanism. This mechanism reni-'Y les prises a tension roll 80jmounted on the outer end of the arms V81 pivoted'at 82 in the frame 16. rEhe tension roll 80 is pressed up? wardly against the tape by means of a spring 83, one end of which is -secured to an arm CII 811 in fixed relation with the arms 81, and the other end of which is secured to a tension regulating screw 85. Fixed to the hub from which the arms 81 project is an arm 80, carrying on its free end a pin 87, which is received in a slot in the free end of the long arm 88 of a bell-crank lever 89 pivoted at 90 on the frame 16. The short arm 92 of the bell-crank lever 89 is connected by a ,link 93 with a lever 94, the horizontal arm of which is connected by a link 95 with an arm 9G fixed on one end of the shaft 97 journaled in the bearing lugs 98 of a bracket 99 secured to the frame 16.V On the other end of the .shaft 97 Vis fixed an arm 101. The arm 96, the shaft 97 and the arm 101 thus constitute a bell-crank lever which is adapted to be operated by the link 95. The arm 101 is provided at its free end with a pin 102, to which is fastened one end of a brakestrap 103, the other end of which is fastened to an extension of the shaft 97, as shown in F ig. 6. The brakestrap 103 surrounds the driven part of the clutch. The above dcscribed construction is such that when the tension of the transfer tape on the tension roll 80 exceeds the tension of the spring 83, the roll 80 is depressed, thereby moving downwardly the arm 86, with the result that through the connections between the arm 80 and the arm 101 the latter is caused to be moved in a direction to tighten the brakestrap 103 on the driven part 70 of the clutch, thereby retarding the speed at which the shaft of the take-up Vreel is driven; so that the speed of the transfer tape through the machine will be uniform and equal to the peripheral travel of the powder removing rolls.

The peripheral surfaces of the powder removing rolls are covered or coated with a film of sticky material like gum arabic, so as to facilitate the removal of the surplus bronze powder from the waxed surface of the transfer tape. Each powder removing roll is provided with a gum feeding block of felt 105, which is secured in the lower end of a cup 106 inserted for convenient removal in brackets 107 rising from the top of the frame 16. The felt blocks 105 occupy the bottom part of the cups 106, the upper parts of which are adapted to receive water drop by drop from a wick 108 passed through a pipe 109 fixed in a reservoir 110. The wick 108 draws the water by capillary attraction from the reservoir and feeds it to the cups 106 to keep the gum-saturated felt blocks 105 moist, so that the peripheral surfaces of the powder removing rolls will be kept coated with a film of gum.

. The peripheral surfaces of the powder removing rolls are kept free of the surplus pcdwer being removed from the transfer tape by a. series of roll cleaning blocks 112, each powder removing roll beingl provided with .upon the transfer tapc at one time.

a block. The roll cleaning blocks are mounted on arms 113 pivoted to the frame 16 on the pins 114. Each block is provided with a cleaning surface consisting' of textile or some like material 115. This material is of such composition that it absorbs a considerable amount of bronze dust before a fresh surface thereof needs to be presented to the powder removing rolls.

`When the roll of transfer tape is inserted in the machine for the feeding operation, the pressure rolls occupy the position shown in Fig. et, the transfer tape lying loosely upon the pressurev rolls, Inasmuch as the transfer tape is composed of thin and brittle paper, it is necessary to bring the pressure rolls into operative position sequentially, so as not to exert too great a strain The construction for bringing the pressure rolls into operative position sequentially comprises a sliding bar 117 mounted in guideways 118 secured to the frame 16. The slide bar is provided on its under surface with a short'rack 119, which meshes with a pinion 120 mounted on a shaft 121, on the outer end of which is fixed. a hand-wheel 122. (n

the upper surface of the slide bar are fixed a series of wedge blocks 124, 125, 126, 127 and 128. These wedge blocks are adapted to contact with the rounded eues of regulatine` screws 129 with one of which each arm 53 is provided. B v reference to Fig. 4L. it will be seen that the beveled surface of the wedge block 124.- is nearer the rounded end of the screw 129 of the pressure roll 48 than the beveled surface of the wedge block 125 is to the rounded end of the screw 129 of thepressure roll 19. 1t will also be seen. that the beveled surfaces of t ie wedge blocks 126, 127 and 128 are still farther removed from the rounded ends of their respective screws 129. This construction is such that when the hand-wheel 122 is turned to raise the pressure rolls into operative position, pressing the transfer tape against the powder removing rolls, the roll 48 will move into operative position rst and then the other rolls will be. moved into operative position as the operator continues to turn the wheel 122 and move the slide bar to the left (Fig. 1). It is thus seen that no undue or breaking strain is exerted upon the transfer tape. The pressure with which each pressure roll presses the tape against its respective powder removing roll is regnlated by turning its respective screw 129 in its arm 53. The limit of movement of the slide bar is determined by stop-pins 130.

The layers of surplus bronze powder upon the transfer tape seldom or never exceed three or, at the most. four layers. and consequently the machine is provided with four powder removing rolls. These rolls` not only remove the powder loosely adhering t-o the waxed surface of the transfer tape, but they also remove such powder as does not rmly adhere to the'tacky surface of the design printed on the transfer tape. 1t is thus seen that the surplus powder re moving machine not only removes the powder from the waxed surface of the transfer tape, but also insures that the decalcomias or transfer pictures will be composed of a uniform quantity of bronze powder. Naturally, the first of the series of po-wder removing rolls Vwill remove the greater part of the surplus powder from the transfer tape and the next succeeding rolls will remove a decreasing amount of powder therefrom, so that by the time the tape reaches and passes the fourth powder removing roll, the surplus bronze powder is thoroughly removed from the tape. The tape then passes.v in contact with a iifth roll 132. The

peripheral surface of this roll is not provided with a sticky substance, because it does not perform the function of removing powder from the tape. The sole function of this roll is to convey a film of water to the tape for the purpose of washing it preparatory tothe polishing of the tape, which is accomplished by a polishing roll 133 mounted on a shaft 134 journaled in the frame 16. The polishing roll 133 is driven at higher rate of speed than the dust removing' rolls, and for this purpose the hub of the roll 132 is provided with a gear 135, which meshes with a pinion 136 in turn meshingwith a. gear 137 xed on the hub of the polishing roll 133. The surface of the polishing roll 133 is kept in proper condition by a bufiing-wheel '138. The buiiing-whcel 138 is driven at a different rate ofspeed from the polishing wheel 133, so that there will be a relative movement between the peripheries of the twowheels. For this; purpose, the bufling-wheel is providedwith. a relatively large gear, which meshes with and is driven by al pinion 140, in turn meshing with and driven by the gear 137. The transfer tape is pressed against the polishing roll V133 by an idler roll 142, and from the idler roll 142 the tape passes between two guide rolls 1413 tothe tension roll S0.

1t will be understood from the above description of the machine for removing surplus bronze powder from vthe surface of the transfer tape that the operation of removing the powder is performed by pressing the powder removing surface against the surface covered with the surplus powder and then lifting the powder removing surface from the other without a rubbing movement. The action amounts substantially to picking' the particles of bronze powder from the transfer tape. The yielding peripheral surfaces of the powder removing rolls upon which is spread the thin film of sticky substance to which the particles of powder. adhere have no tendency to:` press the'particles of powder into the waxed surface of the transfer tape. Consequently, each particle of powder onthe waxed surface of the transfer tape is removed by one or another of the powder removing rolls. And inasmuch as the peripheral surfaces of these. rolls are kept clean bythe cleaning blocks, all the powder on the waxed surface of the tape is removed, and also suc-h powder as does not firmly adhere to the tacky surface of the design constituting thedecalcomania or transfer picture. i

Inasmuch vas the function` of the machine for remo-ving the surplus powder from surfaces is performed by pressing a surface covered with a sticky substance.v or some other material to which the powder will adhere against the powder covered surface, then lifting the sticky surface therefrom without rubbing, it willbe recognized that the invention may be embodied in other forms `than that shown and described and still be within the scope of the following claims. Y'

The process herein disclosed is claimed in application Serial No. 303,684; and a transfer tape is disclosed and claimed in applica tion Serial No. 303,683, both of even date herewith. n

Having thus described the invention, what 1 claim as new is v 1. A machine for removing surplus powder from surfaces, comprising a powder removing surface coated with a sticky substance, means for pressing the sticky surface against a surface covered with powder to remove therefrom the powder not adhering firmly to the surface and for lifting the sticky surface from the powder covered surface.

2. A machine for removing surplus powder from surfaces, comprising a. powder removing surface coated with a sticky substance, means for pressing the sticky surface against a powder covered surface and lifting it therefrom so as to remove from the powder covered surface such powder as does not adhere firmly thereto, and means for cleaning the removed powder from the powder removing surface.

3. A machine for removing surplus powder from surfaces, comprising a powder removing surface, means for bringing the powder removing surface and a surface covered with powder in contact and for disengaging them without a rubbing movement between the two so that the powder removing surface will remove from the powder covered surface such powder as does not adhere firmly thereto.

4. A machine for rremoving surplus powder from surfaces, comprising a driven roll having its periphery coated with a sticky substance, means for feeding the powder covered surface gist the roll and in contact therewith, and means for cleaning from the roll the powder removed from the powder covered surface.

5. A machine for removing surplus powder from surfaces, comprising a series of driven rolls, means for coating the peripheral surfaces of the rolls with a sticky substance, and means for feeding past the rolls and in contact therewith a powder covered tape.

6. A machine for removing surplus powder from surfaces, comprising a series ofl driven, powder removing rolls, means for coating the peripheral surfaces of the rolls with a sticky substance, a cleaning roll, a polishing roll driven at a higher speed than the cleaning roll, and means for feeding a strip of powder covered tape past and in contact with the rolls so that the powder removing rolls will remove the powder not adhering irinlv to the tape, the cleaning roll will wash the tape, and the polishing roll will polish it.

7. A machine for removing surplus powder from surfaces, comprising a series of powder removing rolls, means for bringing the powder covered surface in contact with the rolls without rubbing it there-against, and a cleaning block for each roll for cleaning therefrom the powder removed from the powder covered surface.

8. A machine for removing surplus pow- .der from surfaces, comprising a series of driven powder removing rolls, means for feeding a strip of powder covered tape past the rolls at a speed equal to the peripheral speed of the rolls, and means for pressing the tape against the rolls.

9. A machine for removing surplus powder from surfaces, comprising a series of powder removing rolls, means for coating the peripheral surfaces of the rolls with a sticky substance, means for feeding a tape past the rolls, a series of pressure rolls corresponding to the powder removing rolls for pressing' the tape against the latter, and means for 'bringing the pressure rolls into operative position sequentially.

10. A machine for removing surplus bronze powder from waX coated surfaces of transfer tape having decalcomanias printed thereon7 comprising a powder removing surface covered with a sticky substance, means for bringing the powder removing surface in contact with the powder covered surface of the waxed transfer tape and separating the two without a rubbing movement between tlieni, and means for cleaning the powder removing surface.

MAURICE S. ROSENFELD. 

